/*
 * Copyright (c) 2020 - present, Inspur Genersoft Co., Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.iec.edp.caf.sumgr.core;

import io.iec.edp.caf.commons.runtime.FileOperator;
import io.iec.edp.caf.commons.runtime.msu.MsuConfigVariable;
import io.iec.edp.caf.commons.runtime.msu.entities.MsuCommonInfo;
import io.iec.edp.caf.commons.runtime.msu.entities.ServiceUnitYaml;
import io.iec.edp.caf.commons.utils.SpringBeanUtils;
import io.iec.edp.caf.msu.api.ServiceUnitAwareService;
import io.iec.edp.caf.sumgr.api.ServiceUnitGenerator;
import io.iec.edp.caf.sumgr.api.entity.ServiceUnitInfo;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.StringUtils;

import java.io.*;
import java.util.ArrayList;
import java.util.List;

/**
 * @author wangyandong
 * @date 2021/04/09 10:11
 */
@Deprecated
public class ServiceUnitGeneratorImpl implements ServiceUnitGenerator {

    private static final String FILE_NAME = "ServiceUnit.json";

    private static final String JSON_FORMAT =
            "{\n" +
                    "    \"ServiceUnitInfo\" :\n" +
                    "    {\n" +
                    "        \"ApplicationName\" : \"%s\",\n" +
                    "        \"ServiceUnitName\" : \"%s\",\n" +
                    "        \"Type\" : \"%s\"\n" +
                    "    }\n" +
                    "}";

    private static final Logger logger = LoggerFactory.getLogger(ServiceUnitGeneratorImpl.class);

    /**
     * whether ServiceUnit.json exists
     *
     * @param destDir The directory for the root of the package hierarchy
     *                for generated files.
     */
    public Boolean exists(File destDir) {
        if (destDir == null || !destDir.isDirectory())
            throw new IllegalArgumentException("destDir is null or invalidate");

        File[] files = destDir.listFiles((dir, name) -> {
            File file1 = new File(dir, name);
            return file1.isFile() && name != null && (MsuConfigVariable.SU_JSON_FILE.equalsIgnoreCase(name)
                    || MsuConfigVariable.SU_YAML_FILE.equalsIgnoreCase(name) || MsuConfigVariable.SU_YML_FILE.equalsIgnoreCase(name));
        });

        //识别为su目录
        return (files != null && files.length > 0);
    }

    /**
     * Generate service-unit.yaml.
     *
     * @param msuYamlInfo msu information
     * @param destDir     The directory for the root of the package hierarchy
     *                    for generated files. Can not be null.
     */
    @Override
    public void generate(ServiceUnitYaml msuYamlInfo, File destDir) {
        if (msuYamlInfo == null || msuYamlInfo.resolveName() == null || msuYamlInfo.resolveApplicationName() == null)
            throw new IllegalArgumentException("ServiceUnitInfo is null or contains empty parameter");

        if (destDir == null || destDir.isDirectory() == false)
            throw new IllegalArgumentException("destDir is null or invalidate");

        File file = new File(destDir, MsuConfigVariable.SU_YAML_FILE);
        if (file.exists()) {
            logger.error("It has already exited service-unit.yaml at " + destDir);
            return;
        }
        try {
            //创建文件
            file.createNewFile();

            String data = FileOperator.toYaml(msuYamlInfo);
            try (FileWriter fileWritter = new FileWriter(file, true);
                 BufferedWriter bufferWritter = new BufferedWriter(fileWritter);
            ) {
                bufferWritter.write(data);
                bufferWritter.flush();
            }
        } catch (IOException e) {
            logger.error(e.getMessage(), e);
        }
        //将su注册至本地服务中
        try {
            List<io.iec.edp.caf.msu.api.entity.ServiceUnitInfo> infos = new ArrayList<>();
            infos.add(new io.iec.edp.caf.msu.api.entity.ServiceUnitInfo(msuYamlInfo.resolveMsuCommonInfo()));
            ServiceUnitAwareService suAwareSvc = SpringBeanUtils.getBean(ServiceUnitAwareService.class);
            assert suAwareSvc != null;
            suAwareSvc.registerServiceUnitsInfo(infos);
        } catch (Throwable e) {
            throw new RuntimeException("Could not register Msu", e);
        }
    }

    /**
     * Generate ServiceUnit.json.
     *
     * @param destDir The directory for the root of the package hierarchy
     *                for generated files. Can not be null.
     */
    @Override
    public void generate(ServiceUnitInfo info, File destDir) {
        if (info == null || info.getName() == null || info.getApplicationName() == null)
            throw new IllegalArgumentException("ServiceUnitInfo is null or contains empty parameter");

        ServiceUnitYaml serviceUnitYaml = info.convertToYaml();
        generate(serviceUnitYaml, destDir);
    }

}
